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20 MPH Speed Limit Sign – Diagram 670-A. Mandatory UK traffic sign for enforcing a 20mph limit. Complies with TSRGD, ideal for roads near schools, housing, or high footfall areas.
Professional design, supply, and installation of all types of traffic signs across the UK.
Learn More 🚀The 20 MPH Speed Limit Sign – Diagram 670-A is a mandatory UK road sign used to indicate a maximum speed limit of 20 miles per hour. Recognisable by its red circular border and bold black numerals, it plays a vital role in slowing traffic in residential areas, near schools, and on roads with higher pedestrian activity.
This sign is fully compliant with TSRGD Diagram 670-A and is specified in the Traffic Signs Manual, Chapter 3. As a permanent regulatory sign, it helps enforce safer road behaviour and reduce accident rates, especially in urban, built-up, and high-footfall zones.
Manufactured with RA1 and RA2 reflective face materials, the 20 MPH sign is available in a variety of sizes and substrates, including Zintec, GRP, composite panels, 3mm or 5mm plastic, and self-adhesive vinyl for internal applications. It can be supplied as plate-only, riveted in a frame, quick-fit, or as a sticker depending on installation needs.
Diagram 670-A is used across the UK to legally enforce speed limits in sensitive traffic zones such as town centres, school perimeters, hospital roads, or shared-space neighbourhoods. With increased government focus on 20mph zones in urban areas, this sign is essential for public safety and legal compliance.
✔️ Fully compliant with UK TSRGD regulations
✔️ High-visibility reflective RA1/RA2 options
✔️ Tough, weatherproof substrates for long-term use
✔️ Available in multiple sizes and mounting styles
✔️ UK-manufactured with fast delivery options
✔️ Suitable for councils, schools, developers, and contractors
• Urban and suburban traffic zones
• Residential streets and school zones
• Housing developments or 20mph pilot schemes
• Traffic calming schemes or pedestrian-heavy areas
• Local authority and contractor installation
• ✅ 20 MPH Speed Limit Sign – Diagram 670-A
• ✅ Mandatory sign for enforcing speed zones
• ✅ TSRGD & Chapter 3 compliant
• ✅ Multiple size, material, and mounting choices
• ✅ Suitable for any UK permanent traffic calming scheme
| Feature | Details |
|---|---|
| Product Name | 20 MPH Speed Limit Sign |
| Diagram Number | 670-A |
| Reflective Class (Facing) | RA1 (urban), RA2 (higher visibility) |
| Mounting Options | Plate-only, Riveted Frame, Quick Fit, Self-Adhesive |
| Material (Substrate) | Zintec, GRP, Composite, 3mm Plastic, 5mm Plastic, Stickers |
| Available Sizes (mm) | 300, 450, 600, 750,900,1200,1500 |
| Compliance | TSRGD Diagram 670-A, Chapter 3 |
| Section | Link & Description |
|---|---|
| 🛒 Shop Speed Limit Signs | Explore our full range of speed restriction signs |
| 📏 Sizing Guide | Compare all available sizes |
| 🧰 Installation Options | See our mounting systems |
| 📞 Get a Quote | Get pricing for Diagram 670-A signs |
| 📚 TSRGD Guidance | Read the Traffic Signs Manual |
| Weight | 4.9 kg |
|---|---|
| Facing | RA1, RA2, R3B |
| Substrate | Aluminium, Composite, Stickers |
| Fixing | Channel, Plate Only, Self-Adhesive |
| Size (mm) | 300, 600, 750, 900 |
| Facing Type | Warranty Duration |
|---|---|
| RA1 | 7 years |
| R2/RA2 | 10 years |
| R3B/R3C | 12 years |
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